Can you explain the specific date and time of Sai Baba's Mahasamadhi as detailed in the text?

According to Chapter 42, Sai Baba's Mahasamadhi occurred on a very specific day with multiple convergences. The text states it was in the Shaka year 1840, during the first month of the sun's southern transit (Dakshinayan). The day was Vijayadashami, which is also known as Dussehra. This coincided with the 9th day of the Muslim month, the night of 'Kattal' or the eve of Moharram. The chapter further clarifies that Sainath made preparations for his departure during the third watch of the day. It also mentions a detail about the lunar day, noting that the time of departure was Ekadashi, as the tithi at sunrise is the one considered for Dussehra.